Pictured here is the Axiom EP400 Epicenter Powered Subwoofer with its grill off, exposing the 8-inch diameter Driver. Also, backing up the driver is a powerfull 500 watt amplifier. The EP400 has a frequency response of 25Hz-150Hz +/- 3dB. This means that extreme low frequencies are reproduced accurately.
For a look at the rear view of the EP400, proceed to the next photo.